Marine Gas & Petrol Vapour Alarms

Nereus Alarms manufacture and sell a range of high quality gas alarms (gas detectors) for boats, RIBs and small craft. Proven in use for over 10 years, these products offer outstanding reliability and protect from the dangers of,

LPG (butane/propane)

Petrol Vapour

Carbon Monoxide

These professional alarms are widely used by boat builders, charterers, small vessel coders (MCA), gas fitters, marine engineers, boat & RIB owners, working boats and Government agencies around the world.

Products range from single sensor alarms to multi-sensor gas control systems. All are available directly from Nereus Alarms or via our distributors.

All products benefit from careful design and many years of experience in the gas detection industry. Developed specifically for boats, these products can withstand the rigors of these environments. The unique waterproof gas sensors have proved indispensable to our marine customers. Read more >>>

Ongoing product development and discussions with our customers have resulted in our new generation of gas solenoid valves. These draw only one third of the normal current and as a consequence are far more efficient and run much cooler than others on the market. These valves are designed for use with our “-V” range of gas control systems. Read more >>>

Nereus Alarms specialise in a variety of detectors and alarms for marine safety. Products are suitable for yachts, RIBs, motorboats, narrowboats, super yachts and are supplied to many sectors of the market including boats owners, surveyors, marine gas installers and charterers. You can also our gas alarms and gas detetcors online. We provide gas alarms and gas detectors for LPG, LP gas, butane, propane, Calor gas, hydrocarbon gas, petrol vapour, petrol vapor, carbon monoxide (CO). Gas control systems are also available for manual switching of gas supply (on/off) with gas solenoid valve with automatic shut down in the even of a leak or power failure. Gas detectors for boats have become increasingly important for the MCA code, inland waterways code, small vessel code, harmonised small vessel code (MGN 280) and may need to be EN 28846 or ISO 8846 compliant. Our gas alarm systems for boats feature a unique waterproof gas sensor with verified ingress protection (IP) rating. Bespoke systems are also available such as systems incorporating solenoid gas valve switching, bilge alarms or smoke alarms. WetGas